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An A300 had 2 deferred items that conflicted. Thrust management computer and anti-ice valve inoperative locked open. Maximum power takeoff required. Necessary to lock anti-ice valve closed to make maximum power.
| Attributes | |
| ACN | 629177 |
| Time | |
| Date | 200408 |
| Day | Mon |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Make Model Name | A300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel |
| Qualification | other |
| ASRS Report | 629177 |
| Person 2 | |
| Affiliation | government other |
| Function | flight crew : captain |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : schedule pressure performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Chart Or Publication Aircraft Maintenance Human Performance |
| Primary Problem | Aircraft |
| Situations | |
| Publication | Minimum Equipment List |
Narrative:
On aug/sun/04 the captain and dispatcher called ZZZ1 technician about 2 mels 30-04B and 2206A having a conflict. The captain said that MEL 30-04B required a maximum power takeoff MEL 22-06A thrust management system inhibits the engine from over boost and that it had already had 4 over-boosts in the logbook and didn't think this was a good scenario. The ZZZ1 technician agreed. Anti-ice valve was closed and flight opt in no icing. Aug/mon/04 flight abcd ZZZ1-ZZZ2 I came in and had the same scenario with the valve open. I called technician and got no guidance other than it was legal per the MEL. Talked to flight operations technician. He agreed this was not the best option and would look into it. Aug/xa/04, I still don't have an answer.
Original NASA ASRS Text
Title: AN A300 HAD 2 DEFERRED ITEMS THAT CONFLICTED. THRUST MGMNT COMPUTER AND ANTI-ICE VALVE INOP LOCKED OPEN. MAX PWR TKOF REQUIRED. NECESSARY TO LOCK ANTI-ICE VALVE CLOSED TO MAKE MAX PWR.
Narrative: ON AUG/SUN/04 THE CAPT AND DISPATCHER CALLED ZZZ1 TECHNICIAN ABOUT 2 MELS 30-04B AND 2206A HAVING A CONFLICT. THE CAPT SAID THAT MEL 30-04B REQUIRED A MAX PWR TKOF MEL 22-06A THRUST MGMNT SYS INHIBITS THE ENG FROM OVER BOOST AND THAT IT HAD ALREADY HAD 4 OVER-BOOSTS IN THE LOGBOOK AND DIDN'T THINK THIS WAS A GOOD SCENARIO. THE ZZZ1 TECHNICIAN AGREED. ANTI-ICE VALVE WAS CLOSED AND FLT OPT IN NO ICING. AUG/MON/04 FLT ABCD ZZZ1-ZZZ2 I CAME IN AND HAD THE SAME SCENARIO WITH THE VALVE OPEN. I CALLED TECHNICIAN AND GOT NO GUIDANCE OTHER THAN IT WAS LEGAL PER THE MEL. TALKED TO FLT OPS TECHNICIAN. HE AGREED THIS WAS NOT THE BEST OPTION AND WOULD LOOK INTO IT. AUG/XA/04, I STILL DON'T HAVE AN ANSWER.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.